Electroanalytical applications to estimate ionic impurities in reactor systems

The differential potentiometric measurement of chloride in ppb levels using a pair of solid state ultra sensitive chlorine electrodes (up to 100 ppb) is described. Calibration slopes were found to be 158 ± 15 μV/ppb of Cl-. This method has been successfully applied to the determination of chloride in Condensate Polishing Unit system for its evaluation. In addition, differential pulsed adsorption voltametric method of determining nickel and cobalt in 0-3.0 ppb range is also described. This method has been used to monitor Ni2+ and Co2+ levels in Madras Atomic Power Station reactor water. Calibration slopes have been determined by standard addition method. The lowest detection limit in pure demineralised water is 0.01 ppb for both Ni2+ and Co2+. (author). 3 tables